2 layers114.9 × 76 mm
Protected power entry
absmach/synth
Open-source circuit compiler for engineers and AI agents
84 parts29Apache-2.0
2 layers84 × 50 mm
I2c sensor node.synth
absmach/synth29Open-source circuit compiler for engineers and AI agents
- Size
- 84 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 57
- Nets
- 35
- Pads
- 161
- Tracks, vias
- 0, 0
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 9 Sep 2026
- Updated
- 6 Nov 2026
Overview
I2c sensor node.synth is an open-source printed circuit board by absmach, from the absmach/synth repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 84 × 50 mm with 57 parts on 35 nets.
It is built around the STM32G030F6P6, BME680 and 24LC256-I/SN, with the AMS1117-3.3, 1N5819HW-7-F-01 and LTST-C190KGKT among its other parts. Its parts include 17 resistors, 17 diodes, 11 capacitors, 4 ICs and 4 connectors. It belongs with the audio and music and home automation and IoT boards and the STM32 boards of this library.
Main components
7
STM32G030F6P6
TSSOP-20-40℃~+85℃ 12bit 17 2V~3.6V 32 Bit 32KB 64MHz 8KB ARM Cortex-M0+ Built-in+External FLASH TSSOP-20 Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
BME680
LGA-8-40℃~+85℃ 0.12hpa 0.6hpa 1.3pa/K 1.71V~3.6V 150nA 30Kpa~1.1bar I2C、SPI Temperature Sensor LGA-8 Pressure Sensors ROHSBosch SensortecPressure Sensors
24LC256-I/SN
SOIC-8-40℃~+85℃ 1,000,000 cycles 2.5V~5.5V 200 Years 256Kbit 400kHz 5ms Hardware write protection function、Noise suppression function I2C SOIC-8 EEPROM ROHSMicrochip TechnologyEEPROM
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
1N5819HW-7-F-01
SOD-123Schottky DiodesDiodes Incorporated
LTST-C190KGKT
0603-30℃~+85℃ 130° 20mA 2V 35mcd 567.5nm~576.5nm 574nm 75mW Discrete Diode Water Clear Yellow Green 0603 LED Indication - Discrete ROHSLite-OnLED Indication - Discrete
PTVS6V0S1UR
SOD-123ESD And Surge Protection (TVS/ESD)FUXINSEMI
README
examples/rp2350/README.mdRP2350 routed example
Latest regenerated run
The full-board reconstruction routes with the installed FreeRouting pipeline
on six layers. Local generated artifacts are under
reproductions/rp2350-reconstructed/generated/:
rp2350_devboard_reconstructed.synth— reconstructed Synth sourcerp2350_devboard_reconstructed.layout.toml— recovered placement sidecarrp2350_devboard_freerouted_6layer.kicad_pcb— routed KiCad boardrp2350_devboard_freerouted_6layer.png— rendered review imagefreerouted-6layer-drc.rpt— native KiCad DRC report
FreeRouting completed with 0 unrouted signal nets. The DRC report still contains 14 ground-zone island items and two footprint-library warnings; this is not production sign-off until those items are reviewed.
rp2350_devboard_freerouting_clean.kicad_pcb is a pre-generated compact KiCad
review artifact.
Reference dimensions: approximately 84.5 × 73.1 mm.
Open the KiCad board for an interactive review.
The companion DRC report records the current review state. The authoritative KiCad check currently reports 80 DRC violations and 18 unconnected items. The 18 unconnected entries are zone-to-zone ground-island reports, not ordinary signal-pad pairs, but they are still violations. This is an example and review fixture, not production sign-off; silkscreen and footprint library warnings also require engineering review.
Parts
57| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 3.3V zener | Diode_SMD:D_SOD-123 | D7, D8, D9, D10, D11, D12, D13, D19, D20, D21, D22, D23, D24 |
| 9 | 330 | Resistor_SMD:R_0603_1608Metric | R11, R15, R16, R17, R18, R19, R20, R21, R22 |
| 6 | 100nF | Capacitor_SMD:C_0603_1608Metric | C5, C6, C8, C10, C11, C12 |
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1, C2, C4 |
| 2 | (no value) | MountingHole:MountingHole_2.5mm | H2, H3 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R13, R14 |
| 2 | 1N5819 | Diode_SMD:D_SOD-123 | D1, D14 |
| 2 | 4.7k | Resistor_SMD:R_0603_1608Metric | R9, R10 |
| 1 | 0.5A hold | Fuse:Fuse_1812_4532Metric | F1 |
| 1 | 100 | Resistor_SMD:R_0805_2012Metric | R23 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R12 |
| 1 | 24LC256-I/SN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 47uF | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B | C3 |
| 1 | 680 | Resistor_SMD:R_0603_1608Metric | R24 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | BME680 | Package_LGA:Bosch_LGA-8_3x3mm_P0.8mm_ClockwisePinNumbering | U3 |
| 1 | GPIO | Connector_PinHeader_2.54mm:PinHeader_1x12_P2.54mm_Vertical | J5 |
| 1 | GREEN | LED_SMD:LED_0603_1608Metric | D15 |
| 1 | JST S2B-XH-A-1 | Connector_JST:JST_XH_S2B-XH-A-1_1x02_P2.50mm_Horizontal | J1 |
| 1 | JST S4B-PH-K-S | Connector_JST:JST_PH_S4B-PH-K_1x04_P2.00mm_Horizontal | J3 |
| 1 | PTVS6V0S1UR | Diode_SMD:Nexperia_CFP3_SOD-123W | D4 |
| 1 | RESET | Button_Switch_SMD:SW_SPST_PTS645Sx43SMTR92 | SW1 |
| 1 | STM32G030F6P6 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U2 |
| 1 | SWD | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J4 |
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Questions
How big is the I2c sensor node.synth PCB?
It measures 84 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the I2c sensor node.synth use?
57 parts, built around the STM32G030F6P6, BME680, 24LC256-I/SN and AMS1117-3.3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the I2c sensor node.synth KiCad files?
From the absmach/synth repository on GitHub, at the commit this page was made from: the board is qualification/class-a/i2c-sensor-node/export/i2c_sensor_node.synth.kicad_pcb and its schematic qualification/class-a/i2c-sensor-node/export/i2c_sensor_node.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the I2c sensor node.synth design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).